What brand engine oil does GM recommend?

General Motors recommends using Dexos-certified engine oils for their vehicles. The Dexos specification ensures that the oil meets certain performance and quality standards suitable for GM engines. While GM does not endorse a specific brand, oil brands like Mobil 1, Castrol, and Valvoline offer Dexos-approved products. Always check the owner's manual for the correct viscosity and specifications for your particular vehicle.